Sungyun(Hunt) Jo extJo

## model_binding_demo.dart
/*

ModelBinding<T>: a simple class for binding a Flutter app to a immutable
model of type T.

This is a complete application. The app shows the state of an instance of
MyModel in a button's label, and replaces its MyModel instance when the
button is pressed.

ModelBinding is an inherited widget that must be created in a context above
	/*

	ModelBinding<T>: a simple class for binding a Flutter app to a immutable
	model of type T.

	This is a complete application. The app shows the state of an instance of
	MyModel in a button's label, and replaces its MyModel instance when the
	button is pressed.

	ModelBinding is an inherited widget that must be created in a context above